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Question 59Asked in DSSSB TGT Computer Science, 7 Feb 2024, Shift 2 (12:30 PM)

A truck left 8 hours early than the scheduled time and in order to reach its destination

A truck left 8 hours early than the scheduled time and in order to reach its destination 600 km away on time, it had to decrease its usual speed by 20 km/hr. What is the usual speed of the truck?
  1. A30 km/hr
  2. B50 km/hr
  3. C40 km/hr
  4. D60 km/hr
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Correct answer: (B) 50 km/hr

Explanation

600/(s − 20) − 600/s = 8 gives s(s − 20) = 1500, so s = 50 km/hr. Check: 600/30 − 600/50 = 20 − 12 = 8 hours.

From DSSSB TGT Computer Science PYQ, 7 Feb 2024, Shift 2 (12:30 PM)

This is question 59 of DSSSB TGT Computer Science PYQ, 7 Feb 2024, Shift 2 (12:30 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.